#include <stdio.h>

struct book
{
    char title[20];
    char autor[20];
    char subject[20];
    int book_id;
} book = {"c语言", "jack", "编程语言", 12334};

int main(int argc, char const *argv[])
{
    printf(" 书名>:%s\n 作者>:%s\n 类型>:%s\n id>:%d", book.title, book.autor, book.subject, book.book_id);
    return 0;
}
